While the weather is still good, I refinished my headlights again as I wasn't 100% happy with the job I did last time. I had been applying a Meguiar's Protectant to them, which brought them up to crystal clarity, but it washed off every time there was rain and that was unsatisfactory. This time I sanded them up to 2500 grit (up from 1200 last time), used a plastic polish (and spent more time on it for a better result), and then used a compound called Opti-lens to seal it up this time. I'm pretty happy with the results.